Malicious PDF — malware analysis report

Static analysis result for SHA-256 13bab49cda0abeb1…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 21:27:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0670bc312b2e57be36d223ddb4d505d8 SHA-1: dede3b1cff2563a82cda00efb5b1d659ee1e9ed7 SHA-256: 13bab49cda0abeb1390289aa0c2d4b60cd58d1a1eadb06b0d5de932df9dfdef4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free game hacks' or currency. The heuristic firings confirm these links are part of a redirection lure and point to malicious sites. No scripts were extracted, but the document body and heuristics indicate a phishing or scam attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/earn-robux-today-free-game-hack In PDF document text
    • http://pustaka.bbppketindan.info//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-converter_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-accounts-with-obc-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F66 22056 bytes
SHA-256: cb6dd8e4a79f54d7d0bdd3a19ab8a5b8f47783a8b4f53554107421a174b02f93
font_01_sfnt_off00005f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 19072 bytes
SHA-256: fb754237f519d509cf5539eb977c12373e9e8d5052fc61e0cfe5801d586bc234

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